Top players must have excellent ball control, but it is not just ________ they do with their feet ________ counts．
A.how; thatB.that; whatC.what; thatD.whether; what在线课程C
考查名词性从句和定语从句。第一空引导名词性从句中的表语从句，与do with连用，应用what；第二空引导定语从句，先行词是feet，指物，关系词在从句中作主语，应用that，因此C项正确。